Also:
- add kPreInitiliazed state to native bridge with check transition:
kOpened->kPreInitialized->kInitialized
- made sure we free the memory for the code_cache_path
- tidy up some error messages
- tidy up tests
- add a dummy native bridge to test with
Bug: 18027433
Bug: 18097480
Change-Id: I39f74c93580f2e224080dd3df2ffaa9cf9f8cd9c
Change PreInitializeNativeBridge to have a different path for
the host to allow testing. Add a test (needs root privileges).
Add a test for NeedsNativeBridge.
Change error reporting to use strerror.
Change-Id: Id2d488f0484ff8b0438863b48ef43770e784505f
